Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651548
F. Sheidaei, M. Shadkam, M. Zarei
This paper presents a method for optimal allocation of distributed generation in distribution systems. In this paper, our aim would be optimal distributed generation allocation for loss reduction in distribution network. Ant colony search algorithm (ACSA) was used as solving tool. ACSA is inspired from the natural behaviour of the ant colonies on how they find the food source and bring them back to their nest by building the unique trail formation. This algorithm is used to minimize an objective function. For applying ACSA, a soft ware is programmed under Matlab software is prepared. This proposed ACSA method and genetic algorithm (GA) are implemented on IEEE 34 bus system, and the results show that the proposed method is better than the other two methods. Using the proper and optimal allocation of DG has many advantages, but the lack of it has disadvantages, such as: increasing losses, voltage flicker, and harmonic.
{"title":"Optimal Distributed Generation allocation in distirbution systems employing ant colony to reduce losses","authors":"F. Sheidaei, M. Shadkam, M. Zarei","doi":"10.1109/UPEC.2008.4651548","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651548","url":null,"abstract":"This paper presents a method for optimal allocation of distributed generation in distribution systems. In this paper, our aim would be optimal distributed generation allocation for loss reduction in distribution network. Ant colony search algorithm (ACSA) was used as solving tool. ACSA is inspired from the natural behaviour of the ant colonies on how they find the food source and bring them back to their nest by building the unique trail formation. This algorithm is used to minimize an objective function. For applying ACSA, a soft ware is programmed under Matlab software is prepared. This proposed ACSA method and genetic algorithm (GA) are implemented on IEEE 34 bus system, and the results show that the proposed method is better than the other two methods. Using the proper and optimal allocation of DG has many advantages, but the lack of it has disadvantages, such as: increasing losses, voltage flicker, and harmonic.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116130781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651491
M. Aghamohammadi, A. Ghorbani, S. Pourmohammad
In this paper a Posicast controller is designed to improve the power system stability containing the transient and the small signal stability. Unlike most of the recently published excitation control schemes, Posicast control is an unsophisticated and easy to implement control method that can effectively improve the stability of the system without increasing the complexity of the control system. The proposed controller is simulated under several large and small sudden 3-phase faults occurred in the different parts of the lines. It is also shown that the proposed controller increases the capability of the system in damping the oscillations caused by changing the exciter reference signal. In other words only one controller is used to improve the transient and small signal stability as well as the voltage stability. The results from extensive time domain simulations using MATLAB/Simulink demonstrate that the offered control strategy is superior to the conventional excitation control methods and can improve performance of the system in the all testing conditions. A performance index is also used to validate the effectiveness of the proposed controller in improving the system stability.
{"title":"Enhancing transient and small signal stability in power systems using a posicast excitation controller","authors":"M. Aghamohammadi, A. Ghorbani, S. Pourmohammad","doi":"10.1109/UPEC.2008.4651491","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651491","url":null,"abstract":"In this paper a Posicast controller is designed to improve the power system stability containing the transient and the small signal stability. Unlike most of the recently published excitation control schemes, Posicast control is an unsophisticated and easy to implement control method that can effectively improve the stability of the system without increasing the complexity of the control system. The proposed controller is simulated under several large and small sudden 3-phase faults occurred in the different parts of the lines. It is also shown that the proposed controller increases the capability of the system in damping the oscillations caused by changing the exciter reference signal. In other words only one controller is used to improve the transient and small signal stability as well as the voltage stability. The results from extensive time domain simulations using MATLAB/Simulink demonstrate that the offered control strategy is superior to the conventional excitation control methods and can improve performance of the system in the all testing conditions. A performance index is also used to validate the effectiveness of the proposed controller in improving the system stability.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125362558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651434
Ali Arzani, Mostafa Jazaeri, Y. Alinejad‐Beromi
Series FACTS devices have been successfully used for many years in order to enhance the stability and loadability of high voltage transmission networks. The principle is to compensate the inductive voltage drop in the line by an inserted capacitive voltage or in other words to reduce the effective reactance of the transmission line to enhance available transfer capability (ATC) in the network. ATC accurately reflects the physical realities of the transmission network, all system conditions, uses, and limits in a consistent manner. It depends on other parameters namely total transfer capability (TTC), capacity benefit margin (CBM), transmission reliability margin (TRM), and existing transmission commitments (ETC) that are described in this study thoroughly. This paper investigates the optimized use of FACTS devices and mainly thyristor controlled series capacitor (TCSC) to improve ATC and maximize total transfer capability generally defined as the maximum power transfer transaction between a specific power-seller and a power-buyer in a two area designed power system. The case study has been implemented on a 13-bus multi-machine test system using PowerWorld Simulator version 12.0. Furthermore, static linear analysis methods have been taken into account in calculating ATC and the impact on various factors has been defined clearly.
为了提高高压输电网络的稳定性和负载性，FACTS系列设备已成功使用多年。其原理是通过插入电容电压来补偿线路中的感应电压降，即减小传输线的有效电抗，以提高网络中的可用传输能力(ATC)。ATC以一致的方式准确地反映了传输网络的物理现实、所有系统条件、使用和限制。它取决于其他参数，即总传输能力(TTC)、容量效益边际(CBM)、传输可靠性边际(TRM)和现有传输承诺(ETC)，这些在本研究中得到了充分的描述。本文研究了优化使用FACTS器件和主要是晶闸管控制串联电容器(TCSC)来提高ATC和最大化总传输能力(通常定义为在两个区域设计的电力系统中特定电力卖方和电力买方之间的最大功率传输交易)。本案例研究已在一个13总线的多机测试系统上使用PowerWorld Simulator version 12.0实现。此外，在计算ATC时考虑了静态线性分析方法，明确了各因素对ATC的影响。
{"title":"Available transfer capability enhancement using series FACTS devices in a designed multi-machine power system","authors":"Ali Arzani, Mostafa Jazaeri, Y. Alinejad‐Beromi","doi":"10.1109/UPEC.2008.4651434","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651434","url":null,"abstract":"Series FACTS devices have been successfully used for many years in order to enhance the stability and loadability of high voltage transmission networks. The principle is to compensate the inductive voltage drop in the line by an inserted capacitive voltage or in other words to reduce the effective reactance of the transmission line to enhance available transfer capability (ATC) in the network. ATC accurately reflects the physical realities of the transmission network, all system conditions, uses, and limits in a consistent manner. It depends on other parameters namely total transfer capability (TTC), capacity benefit margin (CBM), transmission reliability margin (TRM), and existing transmission commitments (ETC) that are described in this study thoroughly. This paper investigates the optimized use of FACTS devices and mainly thyristor controlled series capacitor (TCSC) to improve ATC and maximize total transfer capability generally defined as the maximum power transfer transaction between a specific power-seller and a power-buyer in a two area designed power system. The case study has been implemented on a 13-bus multi-machine test system using PowerWorld Simulator version 12.0. Furthermore, static linear analysis methods have been taken into account in calculating ATC and the impact on various factors has been defined clearly.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121532478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651514
Shujie Sun, N. Tai, Zhinqian Bo
This paper presents a kind of algorithm, which can decouple the electrical quantities of quadruple-circuit transmission lines and get completely independent 12 sequence components of quadruple-circuit transmission lines on the same tower system. Based on the analysis of transformation matrix and the impedance matrix of 12 sequence components, the principle of ground impedance relay and the corresponding protection setting scheme are discussed. Through PSCAD / EMTDC simulation software, the power transmission system model with quadruple-circuit transmission lines on the same tower under the voltage of 500 kV are established. The correct operation of protection scheme has been verified with extensive simulation studies.
{"title":"The study of ground distance protection of 500kV quadruple-circuit transmission lines on the same tower","authors":"Shujie Sun, N. Tai, Zhinqian Bo","doi":"10.1109/UPEC.2008.4651514","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651514","url":null,"abstract":"This paper presents a kind of algorithm, which can decouple the electrical quantities of quadruple-circuit transmission lines and get completely independent 12 sequence components of quadruple-circuit transmission lines on the same tower system. Based on the analysis of transformation matrix and the impedance matrix of 12 sequence components, the principle of ground impedance relay and the corresponding protection setting scheme are discussed. Through PSCAD / EMTDC simulation software, the power transmission system model with quadruple-circuit transmission lines on the same tower under the voltage of 500 kV are established. The correct operation of protection scheme has been verified with extensive simulation studies.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124103837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651522
R. Pereira, A.J.C. Pereira, C. Ferreira, F. Barbosa
Electric power network stability analysis requires that all system components are represented by their models. Usually, detailed data about system components such as generators, transformers and transmission lines are available. In this case accurate models can be derived from the network devices. However, corresponding data for individual loads are not always available, which makes the modelling of loads an important area of research studies. In this paper it is studied and analysed the effect of the composite load models in the dynamic voltage stability of an electric power network. The composite load models comprise residential, commercial and industrial loads. A severe contingency situation was simulated. The automatic voltage regulators of the generating units, the turbine speed governors, and the under load tap changers models were taken into account. The simulation results were obtained using the EUROSTAG software package. Finally, some conclusions that provide a better understanding of the dynamic voltage stability are pointed out.
{"title":"Dynamic voltage stability assessment of an electric power network using composite load models","authors":"R. Pereira, A.J.C. Pereira, C. Ferreira, F. Barbosa","doi":"10.1109/UPEC.2008.4651522","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651522","url":null,"abstract":"Electric power network stability analysis requires that all system components are represented by their models. Usually, detailed data about system components such as generators, transformers and transmission lines are available. In this case accurate models can be derived from the network devices. However, corresponding data for individual loads are not always available, which makes the modelling of loads an important area of research studies. In this paper it is studied and analysed the effect of the composite load models in the dynamic voltage stability of an electric power network. The composite load models comprise residential, commercial and industrial loads. A severe contingency situation was simulated. The automatic voltage regulators of the generating units, the turbine speed governors, and the under load tap changers models were taken into account. The simulation results were obtained using the EUROSTAG software package. Finally, some conclusions that provide a better understanding of the dynamic voltage stability are pointed out.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128906016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651666
C. Lam, F. Ng, M. Wong
In this paper, a control scheme for a novel capacitive-coupled STATCOM in three-phase power system is proposed and analyzed. In order to maintain the dc-link voltage to a constant level, an active block diagram model is built. Based on this model, a novel dc-link voltage feedback control scheme is proposed and discussed. The proposed novel capacitive-coupled STATCOM is characterized by lower the dc-link rating of the conventional inductive-coupled STATCOM with good system compensation feature. Simulation results are given to prove the effectiveness of the control scheme together with the dc-link voltage feedback control in the novel capacitive-coupled STATCOM.
{"title":"Control scheme of a novel capacitive-coupled STATCOM","authors":"C. Lam, F. Ng, M. Wong","doi":"10.1109/UPEC.2008.4651666","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651666","url":null,"abstract":"In this paper, a control scheme for a novel capacitive-coupled STATCOM in three-phase power system is proposed and analyzed. In order to maintain the dc-link voltage to a constant level, an active block diagram model is built. Based on this model, a novel dc-link voltage feedback control scheme is proposed and discussed. The proposed novel capacitive-coupled STATCOM is characterized by lower the dc-link rating of the conventional inductive-coupled STATCOM with good system compensation feature. Simulation results are given to prove the effectiveness of the control scheme together with the dc-link voltage feedback control in the novel capacitive-coupled STATCOM.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129889811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651540
G. Carpinelli, P. Caramia, P. Varilone, P. Verde
The voltage continuity and quality are two different aspects of the quality on the electrical supply. Their regulation is of great importance due to the economical consequences associated with the presence of the disturbances in the electrical power systems. While voltage continuity has been regulated in several countries for his undouble importance, the voltage quality has only recently become an important concern for utilities, customers and consulting engineers. Actually, a fervid international debate is underway to find the best economic regulatory mechanism to improve the voltage quality. This paper illustrates some mechanisms of economic voltage quality regulation proposed in the most recent international literature.
{"title":"On the economic regulation of voltage quality","authors":"G. Carpinelli, P. Caramia, P. Varilone, P. Verde","doi":"10.1109/UPEC.2008.4651540","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651540","url":null,"abstract":"The voltage continuity and quality are two different aspects of the quality on the electrical supply. Their regulation is of great importance due to the economical consequences associated with the presence of the disturbances in the electrical power systems. While voltage continuity has been regulated in several countries for his undouble importance, the voltage quality has only recently become an important concern for utilities, customers and consulting engineers. Actually, a fervid international debate is underway to find the best economic regulatory mechanism to improve the voltage quality. This paper illustrates some mechanisms of economic voltage quality regulation proposed in the most recent international literature.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130251774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651672
O. Ahmed, J. Bleijs
This paper presents a new combined design of a passive series LC filter with a 3-phase diode bridge rectifier using three capacitors at the input of the bridge rectifier to boost the dc output voltage without the need for active switching devices. Therefore the rectifier can be use for machine drives without requiring machine de-rating or overmodulation techniques. The input inductor/capacitor filter works to reduce the harmonics current even if the applied ac voltage is already distorted, while the bridge capacitors improve the input power factor. This configuration minimizes the 5th and 7th current harmonics without increasing higher order harmonics, resulting in a total harmonic distortion of less than 2%. At medium and high power levels the rectifier operates at nearly unity power factor. In the paper a comparison is made between a number of three phase diode bridge rectifier topologies with passive networks, and it is shown that the new design outperforms other circuits in all aspects. The operation of the new three phase diode bridge rectifier topology is illustrated by simulation results, which are confirmed by experimental data.
{"title":"Three phase passive bridge rectifier with low distortion input current and boosted DC output voltage","authors":"O. Ahmed, J. Bleijs","doi":"10.1109/UPEC.2008.4651672","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651672","url":null,"abstract":"This paper presents a new combined design of a passive series LC filter with a 3-phase diode bridge rectifier using three capacitors at the input of the bridge rectifier to boost the dc output voltage without the need for active switching devices. Therefore the rectifier can be use for machine drives without requiring machine de-rating or overmodulation techniques. The input inductor/capacitor filter works to reduce the harmonics current even if the applied ac voltage is already distorted, while the bridge capacitors improve the input power factor. This configuration minimizes the 5th and 7th current harmonics without increasing higher order harmonics, resulting in a total harmonic distortion of less than 2%. At medium and high power levels the rectifier operates at nearly unity power factor. In the paper a comparison is made between a number of three phase diode bridge rectifier topologies with passive networks, and it is shown that the new design outperforms other circuits in all aspects. The operation of the new three phase diode bridge rectifier topology is illustrated by simulation results, which are confirmed by experimental data.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130885468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651529
F. Ansyari, C. S. Ozveren, D. King
Recently, allocations of transmission losses have become a major issue in both regulated and deregulated systems. Two main reasons for this are performance and cost issues. Consequently, there have been a large number of investigations undertaken in the area of transmission loss allocation. The aims of this paper are to investigate several loss allocation methods and then choose the best method, or at least the most appropriate and reasonable method. These investigated methods encompass a wide variety of techniques ranging from the classical (Pro-rata and incremental methods) to the newest methods, proportional sharing and Z-bus. The crucial issues of loss allocation are how to measure it precisely and then decide which method is most transparent and perceived to be fair for all parties. In this paper we will firstly developed criteria to categorize loss allocation methods into several groups and then a method will be chosen as a representative of each group. Then, a real network, namely Java-Bali 500 KV grid system, the largest interconnection system in Indonesia, will be used as a case study and each method will be tested under the same loading conditions tested, hi the case studies the losses will be allocated to each load and generator. Based on these simulation results, the results of each method will be compared and the best method will be chosen according to the criteria derived.
{"title":"Comparison of loss allocation methods in a regulated system (A case study at Java-Bali 500KV Grid System in Indonesia)","authors":"F. Ansyari, C. S. Ozveren, D. King","doi":"10.1109/UPEC.2008.4651529","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651529","url":null,"abstract":"Recently, allocations of transmission losses have become a major issue in both regulated and deregulated systems. Two main reasons for this are performance and cost issues. Consequently, there have been a large number of investigations undertaken in the area of transmission loss allocation. The aims of this paper are to investigate several loss allocation methods and then choose the best method, or at least the most appropriate and reasonable method. These investigated methods encompass a wide variety of techniques ranging from the classical (Pro-rata and incremental methods) to the newest methods, proportional sharing and Z-bus. The crucial issues of loss allocation are how to measure it precisely and then decide which method is most transparent and perceived to be fair for all parties. In this paper we will firstly developed criteria to categorize loss allocation methods into several groups and then a method will be chosen as a representative of each group. Then, a real network, namely Java-Bali 500 KV grid system, the largest interconnection system in Indonesia, will be used as a case study and each method will be tested under the same loading conditions tested, hi the case studies the losses will be allocated to each load and generator. Based on these simulation results, the results of each method will be compared and the best method will be chosen according to the criteria derived.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"65 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131220360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-12-16DOI: 10.1109/UPEC.2008.4651460
M. Aghamohammadi, M. Saeedi, M. Zare
Nowadays penetration level of distributed generation in type of small synchronous generators is considerable in power systems. Without accounting for uncertainty factor in dynamic parameters of small synchronous generators, stability assessment of these generators in wide-area power system is uncertain and time consuming by itself. So, regarding small generators in medium voltage level, stability assessment of bulk power systems should be carried out with some simplification accompanied acceptable tradeoff. This paper proposes two approaches for modeling the reduction of subtransmision network including small synchronous generator. The effect of the proposed reduction methods on the transient stability evaluation of bulk power system has been investigated. The proposed approaches have been demonstrated on two types of test system, IDRC 24-bus and Iran national test systems.
{"title":"Impacts of small synchronous generators at medium voltage on transient stability of bulk power system","authors":"M. Aghamohammadi, M. Saeedi, M. Zare","doi":"10.1109/UPEC.2008.4651460","DOIUrl":"https://doi.org/10.1109/UPEC.2008.4651460","url":null,"abstract":"Nowadays penetration level of distributed generation in type of small synchronous generators is considerable in power systems. Without accounting for uncertainty factor in dynamic parameters of small synchronous generators, stability assessment of these generators in wide-area power system is uncertain and time consuming by itself. So, regarding small generators in medium voltage level, stability assessment of bulk power systems should be carried out with some simplification accompanied acceptable tradeoff. This paper proposes two approaches for modeling the reduction of subtransmision network including small synchronous generator. The effect of the proposed reduction methods on the transient stability evaluation of bulk power system has been investigated. The proposed approaches have been demonstrated on two types of test system, IDRC 24-bus and Iran national test systems.","PeriodicalId":287461,"journal":{"name":"2008 43rd International Universities Power Engineering Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130594188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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